From: ebiederm@xmission.com (Eric W. Biederman)
To: Venkappa Mala <Venkappa.Mala@lntinfotech.com>
Cc: "rmk+lkml@arm.linux.org.uk" <rmk+lkml@arm.linux.org.uk>,
Kexec Mailing List <kexec@lists.infradead.org>,
linux-kernel@vger.kernel.org
Subject: Re: Linux kernel crash dumps for ARM
Date: Mon, 04 Jan 2010 21:20:23 -0800 [thread overview]
Message-ID: <m17hrx9lgo.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <EB1A7C66AD0C92419BFFC785A947865A09EA8C9129@BLRINMSMBX01.bglrodc.lntinfotech.com> (Venkappa Mala's message of "Tue\, 5 Jan 2010 10\:19\:31 +0530")
Venkappa Mala <Venkappa.Mala@lntinfotech.com> writes:
I have added the kexec list and corrected the lkml addresses.
In principle it should not be too hard to use kexec on panic
support on arm.
I don't do any arm development so I don't have a clue what the status
of the support is on arm.
> Hi,
>
> With respect to "Linux kernel crash dumps for ARM", i have some doubts which are described as below.
>
> If the machine has crashed so badly that you cannot enter commands or
> the disk is not available then you have three options :-
>
> (1) Hand copy the text from the screen
>
> (2) capture crash logs using Minicom.
>
> (3) save the crash data to a floppy disk or video rom or a swap partition or reserved memory.
>
> In the above three options, 1 & 2 are known and works as well.
>
> Regarding 3 option,
> ----------------------------
> i would like to support for ARM11.
>
> As far as i know, the supported linux kernel crash dumps are
> "lkcd, netdump,diskdump, mini kernel dump and kdump/kexec".
> These are supported for x86 and PowerPC architectures with some constrains.
>
> i have some queries with respect to ARM supports, these are
>
> 1.) kexec is supported in latest kernels
> example: 2.6.29 kernel
> File: arch/arm/kernel/machine_kexec.c
>
> - is this working well or is there any constraints?
>
> 2) As per kexec supports, kexec-tool is required and this allows you to load directly
> to a new kernel from the currently running one
>
> As from my side, i am not able to find arm implementation support in kexec-tools/crash sources.
>
> - is kexce-tool supported for ARM or not?
>
> 3) In lkcd, netdump,diskdump, mini kernel dump and kdump/kexec tools,
>
> - which is the best choice for ARM or are there any best crash dump tool for ARM?
>
> Please clarify my queries.
>
> Best Regards,
> Venkappa
Eric
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Venkappa Mala <Venkappa.Mala@lntinfotech.com>
Cc: "rmk+lkml\@arm.linux.org.uk" <rmk+lkml@arm.linux.org.uk>,
<linux-kernel@vger.kernel.org>,
Kexec Mailing List <kexec@lists.infradead.org>
Subject: Re: Linux kernel crash dumps for ARM
Date: Mon, 04 Jan 2010 21:20:23 -0800 [thread overview]
Message-ID: <m17hrx9lgo.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <EB1A7C66AD0C92419BFFC785A947865A09EA8C9129@BLRINMSMBX01.bglrodc.lntinfotech.com> (Venkappa Mala's message of "Tue\, 5 Jan 2010 10\:19\:31 +0530")
Venkappa Mala <Venkappa.Mala@lntinfotech.com> writes:
I have added the kexec list and corrected the lkml addresses.
In principle it should not be too hard to use kexec on panic
support on arm.
I don't do any arm development so I don't have a clue what the status
of the support is on arm.
> Hi,
>
> With respect to "Linux kernel crash dumps for ARM", i have some doubts which are described as below.
>
> If the machine has crashed so badly that you cannot enter commands or
> the disk is not available then you have three options :-
>
> (1) Hand copy the text from the screen
>
> (2) capture crash logs using Minicom.
>
> (3) save the crash data to a floppy disk or video rom or a swap partition or reserved memory.
>
> In the above three options, 1 & 2 are known and works as well.
>
> Regarding 3 option,
> ----------------------------
> i would like to support for ARM11.
>
> As far as i know, the supported linux kernel crash dumps are
> "lkcd, netdump,diskdump, mini kernel dump and kdump/kexec".
> These are supported for x86 and PowerPC architectures with some constrains.
>
> i have some queries with respect to ARM supports, these are
>
> 1.) kexec is supported in latest kernels
> example: 2.6.29 kernel
> File: arch/arm/kernel/machine_kexec.c
>
> - is this working well or is there any constraints?
>
> 2) As per kexec supports, kexec-tool is required and this allows you to load directly
> to a new kernel from the currently running one
>
> As from my side, i am not able to find arm implementation support in kexec-tools/crash sources.
>
> - is kexce-tool supported for ARM or not?
>
> 3) In lkcd, netdump,diskdump, mini kernel dump and kdump/kexec tools,
>
> - which is the best choice for ARM or are there any best crash dump tool for ARM?
>
> Please clarify my queries.
>
> Best Regards,
> Venkappa
Eric
next prev parent reply other threads:[~2010-01-05 5:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <EB1A7C66AD0C92419BFFC785A947865A09EA8C9129@BLRINMSMBX01.bglrodc.lntinfotech.com>
2010-01-05 4:51 ` Linux kernel crash dumps for ARM Venkappa Mala
2010-01-05 5:20 ` Eric W. Biederman [this message]
2010-01-05 5:20 ` Eric W. Biederman
2010-01-05 8:30 ` Bernhard Walle
2010-01-05 8:30 ` Bernhard Walle
2010-01-05 8:48 ` Paul Mundt
2010-01-05 8:48 ` Paul Mundt
2010-01-05 9:16 ` Simon Horman
2010-01-05 9:16 ` Simon Horman
2010-01-05 19:00 ` Russell King
2010-01-05 19:00 ` Russell King
2010-01-05 22:02 ` Simon Horman
2010-01-05 22:02 ` Simon Horman
2010-01-20 20:39 Ofer Heifetz
-- strict thread matches above, loose matches on Subject: below --
2010-02-25 13:06 Ofer Heifetz
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